log4j error

[Funmilola onolaja]

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Hello,

I am new to Repast and followed the tutorial on the sourceforge page, using windows vista. However, when run the repast with the model, I get the following errors:

On eclipse:
log4j:WARN No appenders could be found for logger (MessageCenter.INTERNAL.repast.simphony.ui.RSApplication).
log4j:WARN Please initialize the log4j system properly.

On Repast Simphony
WARN:
Unable to find class(es) to watch: [] classpath: ../CrimMon/bin;../CrimMon/bin-groovy

ERROR:
Scenario Load Error
java.lang.RuntimeException: Couldn't find classes using supplied class loader: crimmon.CrimMonAgent1 on path: C:\Users\Funlola\workspace\CrimMon\bin
    at repast.simphony.scenario.ScenarioLoader.getAgentClasses(ScenarioLoader.java:274)
    at repast.simphony.scenario.ScenarioLoader.load(ScenarioLoader.java:160)
    at repast.simphony.ui.RSApplication.open(RSApplication.java:247)
    at repast.simphony.ui.RSAppConfigurator.postWindowOpen(RSAppConfigurator.java:40)
    at saf.core.ui.GUICreatorDelegate.runDisplay(GUICreatorDelegate.java:188)
    at saf.core.ui.GUICreator.runDisplay(GUICreator.java:14)
    at repast.simphony.ui.RSUIPlugin.run(RSUIPlugin.java:87)
    at saf.core.runtime.CorePlugin.runApplicationRunnable(CorePlugin.java:64)
    at saf.core.runtime.CorePlugin.run(CorePlugin.java:33)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at saf.core.runtime.Boot.run(Boot.java:125)
    at saf.core.runtime.Boot.main(Boot.java:280)
    at repast.simphony.runtime.RepastMain.main(RepastMain.java:43)

What could be the cause of this?

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